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mesa: add special case in texstore.c for GL_LUMINANCE_ALPHA src image

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About a 10% improvement over the swizzle-copy path.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This commit is contained in:
Brian Paul
2011-11-17 16:03:35 -07:00
committed by José Fonseca
parent 3dd7b53178
commit 0df14f9a55
1 changed files with 26 additions and 0 deletions
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src/mesa/main/texstore.c
+26
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@@ -1348,6 +1348,32 @@ _mesa_texstore_argb8888(TEXSTORE_PARAMS)
}
}
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == MESA_FORMAT_ARGB8888 &&
srcFormat == GL_LUMINANCE_ALPHA &&
baseInternalFormat == GL_RGBA &&
srcType == GL_UNSIGNED_BYTE) {
/* special case of storing LA -> ARGB8888 */
int img, row, col;
const GLint srcRowStride =
_mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType);
for (img = 0; img < srcDepth; img++) {
const GLubyte *srcRow = (const GLubyte *)
_mesa_image_address(dims, srcPacking, srcAddr, srcWidth,
srcHeight, srcFormat, srcType, img, 0, 0);
GLubyte *dstRow = dstSlices[img];
for (row = 0; row < srcHeight; row++) {
GLuint *d4 = (GLuint *) dstRow;
for (col = 0; col < srcWidth; col++) {
GLubyte l = srcRow[col * 2 + 0], a = srcRow[col * 2 + 1];
d4[col] = PACK_COLOR_8888(a, l, l, l);
}
dstRow += dstRowStride;
srcRow += srcRowStride;
}
}
}
else if (!ctx->_ImageTransferState &&
!srcPacking->SwapBytes &&
dstFormat == MESA_FORMAT_ARGB8888 &&